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Date:      Tue, 04 Jul 2000 13:05:40 -0700
From:      Cy Schubert - ITSD Open Systems Group <Cy.Schubert@uumail.gov.bc.ca>
To:        dg@root.com
Cc:        Simon Heath <heath@hardy.mskcc.org>, freebsd-stable@FreeBSD.ORG
Subject:   Re: Poor NFS performance with 4.0-stable 
Message-ID:  <200007042006.e64K6JI08875@cwsys.cwsent.com>
In-Reply-To: Your message of "Mon, 03 Jul 2000 15:20:13 PDT." <200007032220.PAA11735@implode.root.com> 

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In message <200007032220.PAA11735@implode.root.com>, David Greenman 
writes:
> >On moving from 4.0-release to 4.0-stable I'm getting a big slow down in file
> >transfers over NFS.  Previously it was taking about 8s to transfer a 64Mb
> >file (100baseTX), so about 8Mb/sec.  Now it's closer to 20k/sec...  This is
> >when accessing both NFS servers running FreeBSD 4.0-release and Solaris 8.
> >Access speeds when the 4.0-stable machine is running as a server are also
> >very slow.  Access speeds between the other machines is at the 8Mb/sec
> >level.  Any suggestions as to what I should be looking at?  The nic card is
> >an Intel EtherExpress Pro, and there do not appear to be any relevant error
> >messages in /var/log/messages or dmesg.  Any suggestions gratefully
> >received!
> 
>    Are any of the machines connected to a switch? Is the duplex detected
> correctly on all of the ports involved?

Just had this happen to me two weekends ago.  The switch "suddenly" 
didn't configure duplex or speed properly after a seemingly (at the 
time) unrelated network problem and my Legato backups went from 6 MB/s 
to 112 KB/s.  I agree, check the switch first.


Regards,                       Phone:  (250)387-8437
Cy Schubert                      Fax:  (250)387-5766
Team Leader, Sun/DEC Team   Internet:  Cy.Schubert@osg.gov.bc.ca
Open Systems Group, ITSD, ISTA
Province of BC





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